Backwater controlling device



Auig- 1 c. MODLIN BACKWATER CONTROLLING DEVICE Filed May 22, 1947 .n MM m. m

Patented Aug. 16, 1949 "UNITED; STATES em-em *fiF-FEC'E smash; I

BACKWATER ooNTRbLLI'NG- 7 Chester titans, lhicagog llll 1' I Appli'cation May 22, 1947, Serial No. 749,779

2 Claims. (01352425;

7 1 "My invention relates to floor drains'and'bacb water traps, particularly for basement floors.

An object of my invention is to provide a means for draining water from basements and basement floors; 7 I

' A further object of myinve'ntion is to provide, in a floor drain, 'a telescoping backwater trap for thepurpose of "preventing backwaterirom the Sewers of entering the basement and for relieving the *press ure against the drain pipes of the said backwater. V I

A further object of m invention is to provide float valve'means that will becau'sed by the pressure of the backwater from the drain pipes-to seal the openings of the drainand, when the backwaterpressure has been reduced, will allow the 'floatto drop, opening the draiin and thus allowing any water in' the "basement' to escape.

A furtherpbject' of 'my'inve'ntion' is to" provide a floor drain and backwatertrap comprising a number of sections'of'pipes telescoped together when there is no backwater pressure and capable of being extended upwardly under pressure through the' backwater-in the drain'p'ipe, thus helping to relieve the pressure of the backwater on the said drain pipe. I Y

A most important object of my invention is to provide, in a floor drain and backwater trap; a number of rubber gaskets, the lower ed es of which are feathered. The said gaskets being so'attached to the pipe elements that, by'means of the feathered edges and the sealing surfar'qes, they provide a water tight seal between theseveral sections of the expanded backwater trap when water pressure exists in the drainpipe.

A still further object of my invention is to provide countersunk valve sealing means between the top portions of the respective telescoping pipe sections.

A still further object of my invention is to provide a drain means and backwater trap that may be inexpensively produced and easily atings, in which like parts are designated by like numerals, and in which:

Fig. 1 represents a cross-sectional view of a section of basement cement floor and the earth beneath and showing a longitudinal section of my invention attached to the flange of a drain pipe.

Fig. 2 represents a cross-sectional View of my invention showing the various cylinders collapsed 7 2 c afnd'tlscdpect'tofitlierifitheir nbrmau position, with the central poitidif"'thei eoij'broken away.

-Fig Bi-gif'shts' a "t6p"vl w of m invention locking 'in tiie'cfrecticn of arrows 3 3 on Fig. 2. jFig? 4*is"afcr5ss nonar'vi'w'crmy invention taken substannanyrroin 1in 4 4 on Fig. 2, witlfa'pljrtiorit er" broken away.

fMyinvfitilf is fierfill-y d'es'ignated 5. No. t represents s nisteryliii' having'a bore 7 and s'jet"'with-"the"top" djit'is'hf withthe' top'of an opening lf'in' thdcifiiit floor a. 'Ihe bottom iidfof'cylindef fi'jisisealed into" the flange 9 of tne i ramagep pe' 1o,*set inthe ear'th l [beneath the-basement fiber-=8. he top enaof cylinder 6Ii'as"a r'dii'c'd biife w ifovidiiiga shoulder M, the top side ofwlifch' 1s cuntersimk at s. 'A secbridiiietaI; cylin er is'mrsueany in the redticedbore' l3"bf""cyljnde1j6. GyIinder l6 has a"bore lflfaiido' the'ei'ttsltieof 'the'cylinder at thefbottonijtw meant-providea groove l9 whichliolds ai mppenga get 20;firi'n1y'in' place. iiptefi'gaskst 29- momen a sealing surface 2 l againstmesurratecrtne'bor I. The bottom edge 22! of the rubber-gasket 20 is feathered; in order tnaa wiin pressure-irons the backwater Mr'exi'sts iir tiidfai twnrseai the edge'zz of the gasket 20'. The tdpfofthe shoulder M is cfchinteis;link: at "t'itQ receive the tapered" edge 25 or'thebotficin 'cresztensmnurat the top of the cylinder I6. The cylinder 5 has a bo're: l1 ancisprotitiemattheton'vvitlra; reduc d bore 23 aii'dis countersuiiic-ar-zc. collapse 'or telescoped position, the restatement-15 fits snugly into tfiecmmtersunk openin [5* of the cylinder 6.

A second rubber gasket 29 of a smaller circumference is attached to the bottom of a cylinder 21 and provides a sealing surface against the bore I "I in the same manner as described for the rubber gasket 20 on cylinder IS. The cylinder '21 is provided at the top with an extended cap 30,

having a tapered bottom seat 3|, which in the collapsed or telescoped position fits snugly into the countersunk opening 26 of the cylinder l6 so that, in a collapsed position, the top surface 30 of the cylinder 21 is flush with the top surfaces of the extension 4| of cylinder l6 and the surface 39 of the basement floor 8.

A number of drainage holes 32 are provided in the cap 30 and a shaft 33, having a washer and nut 34 and 34' at its end, is dependently attached to the cap 30. Riding on shaft 33 is a cork float 35 to which is attached, by a number I of pins 36, a metal disc 38. Cemented to the disc 38 is a rubber disc gasket 31. When back water pressure exists in the drain pipe Hi, the float 35 will be urged upwardly and the rubber disc gasket 31 will be brought into sealing contact with the openings 32 of the cap 30, so that no water may escape therefrom. (See Fig. 1.) When there is no back water pressure in the drain pipe ID, the cylinders 1'6 and 21 will be in a collapsed or telescoped position, as shown in Fig, 2, with the top 30 flush with the floor surface 39 of the basement. Gravity will maintain the said pipes in this position. Gravity will also keep the cork float 35 and its attached valve 31 in a lowered or open position on the shaft 33, as shown in Fig. 2, thus permitting any water from the basement floor 39 to drain through the openings 32 of the cap 39 and on through the bore 28 into the drain pipe I0 and on into the sewer. r

If, however, because of floods or other reasons, water cannot be carried away from the drain l0 and, in trying to find its level, will back into the said drain I0, the backwater 40 will fill the bore 28 of the cylinder2'l and will urge the float 35 and the valve 31 into. sealing contact with openings 32 in the top 30. Continuous water pressure will force the cylinders and 21 upwardly as far as the shoulder 24 of cylinder 15 and shouler M of cylinder 0 will permit. Thus, the valve 3! prevents any water escaping through the holes 32 and the rubber gaskets and 29 respectively prevent any water from leaking into the spaces 32 between the said cylinders. The increased capacity provided by the upwardly telescoping of the cylinders 21 and i6 will also serve to relieve the pressure of the backwater 40 in the drain ill at critical times while allowing none of the Water to escape into the basement.

An important sealing action of my invention is effected by the rubber gaskets 20 and 29, the feathered edges 22 of which will be forced, by the pressure of the backwater! when it exists, outwardly into a close sealing contact with the surfaces of the bores l and [1, thus preventing any water leakage between the cylinders 6, l6, and 21.

Without further elaboration, the foregoing description and exposition will so fully explain my invention that others skilled in the art, by applying current knowledge readily may adapt the source for use under various requirements of service.

Having thus disclosed and revealed my invention, what I claim as new and desire to secure by Letters Patent is: V, a

1. A floor drain comprising, a telescopic struc-V '4 ture constructed and arranged to be associated with a floor and normally positioned in collapsed form below the said floor level, and float means secured to the innermost pipe of said telescopic structure, the said float means responsive to reverse flow of drainage to project a portion of the said telescopic structure above the plane of the floor, and annular gasket means for sealing the said multiplicity of telescoping pipe sections interposed between cylindrical surfaces of adjacent telescoping pipe sections, the said float means comprising, a rod secured to the top of said drain,

a buoyant element slidably mounted on the said rod, a multiplicity of pins secured to the said buoyant element with free ends projecting upwardly therefrom, and a seal secured to the said pins at the said free ends constructed and arranged to seal the said drain when backwater pressure is increased.

2. A floor drain comprising, a telescopic structure constructed andarranged to be associated with a, floor and normally positioned in collapsed form below the said floor level, float means secured to the innermost pipe of said telescopic structure, the said float means responsive to reverse flow of drainage to close initially the said drain and secondarily to project a portion of the said telescopic structure above the plane of the floor, and annular gasket means for sealing the said multiplicity of telescoping pipe sections interposed between cylindrical surfaces of adjacent telescoping pipe sections, the said float means comprising, a rod secured to the top of said drain, a buoyant element slidably mounted on the said rod, a multiplicity of pins secured to the said buoyant element with free ends projecting upwardly therefrom, and a seal secured to the said pins at the said free ends constructed and arranged to seal the said drain when backwater pressure is increased.

CHESTER MODLIN.

REFERENCES CITED The following references are of record in the 

